The Convention of Cintra was an agreement signed on 30 August 1808, during the Peninsular War. By the agreement, the defeated French were allowed to evacuate their troops from Portugal without further conflict. The Convention was signed at the Palace of Queluz, in Queluz, Cintra, Estremadura.

The Peninsular War (1807–1814) was the military conflict fought in the Iberian Peninsula by Spain, Portugal, and the United Kingdom against the invading and occupying forces of the First French Empire during the Napoleonic Wars. In Spain, it is considered to overlap with the Spanish War of Independence.